Process of producing a mineral-oil emulsion.



I No Drawing.

E sT Es ..1 NT OF SAMUEL Knorr, or VIENNA, AUSTRIA-HUNGARY.

PROCESS OF PRODUCING A MINERAL-OIL EMULSION.

Specification of Letters Patent.

Patented Nov. 30, 1909.

Application filed February 6, 1907. Serial No. 356,006.

. in Processes of Producing a Mineral-Oil Emulsion, of which the following is a full,

clear, and exact specification.

The present invention relates to a process forth'e partial saponification of oleic acid by means of an alkali in the presence of alcohol without the application of heat so that by an addition of mineral oil a mineral oil emulsion is obtained which by being diluted with water can'be converted into solid ointment like productsv f i Heretofore mineral oils have'been converted into emulsions by the addition of soaps and similar emulsions have also been produced by the introduction of fats or fatty acids into mineral oil and subsequent saponifi'cation by means of alkalies. In all these latter processes, the endeavor is, at times under an addition of'alcohol, to effect as complete as possiblea saponification, at a high temperature'and in certain cases vwith pressure and a passing through of oxygen.

fication of the oleic acid in the alcohol and without the applicationof heat The addition of alcohol is mostly intend merely to dilute the final product. p 7

With the process forming the object "of the'present invention only a partial saponiresence of is elfected'; With this mixture of partially saponified oleic acid and alcohol,- very' large quantities of mineral oil can be reduced to an-emulsion, which difiers essentially from all emulsions produced heretofore as by dilution with water a solid and highly absorbent ointment base is obtained rom the liquid and transparent miner'al'oil emulsion.

The nineral oil emulsion isproduced by mixing t'tbQHt-f40 parts of oleic acid with about 20 parts of alcohol and 8 parts of poti ash lye (1:1)- there being no necessity to preserve a' particular temperature; the mixture' can be effected equally well by cold process. 150 parts to 300 parts of mineral oil from any source are then added to 100 parts of the mixture of oleic acid, alcohol and alkali. By the simple addition of 50% of water to the emulsion thus roduced, a satisfactory absorbent material is obtained.

The ointment bases now on the market are either very expensive or have the disadvantage that they are not readily absorbed by the skin, or do not-readilycombine with various medicaments or change their properties by coming in contact with them.

The ointment base produced by the process forming the object of the present invention is a product which is as far as possible neutral and indifferent and which is remarkably cheap and absorbent and at the same time can be used'for inanypurposes for which the emulsions now on the market ointment like product, substantially as described.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

SAMUEL KNOPF. Witnesses:

ALvEs'ro S. HOGUE, AUGUST FUGGER. 

